Challenge with neglected open connections from a comet

Utilizing various comet techniques like long polling and forever frame, along with iframes for cross subdomain activities, has presented a challenge during implementation. When a user refreshes the page or navigates to another page, a new request is made while the previous comet connection remains open. Despite my server (tornado) never receiving a connection close signal and no TCP fin packet being detected through wireshark, the sockets are eventually closed upon closing the browser.

These lingering open connections not only consume unnecessary memory on the server side but also create issues when the server tries to send messages to these open sockets resulting in error messages displayed by IE such as "Can't execute code from a freed script". It seems like IE is attempting to execute code on a window that was already navigated away from. How have others addressed this issue? Is using onbeforeunload to manage connection closure a viable solution?

javascriptajaxcometlong-pollingtornado

Answer №1

One strategy is to periodically refresh an active connection from the client side. If a request fails to reach the server within a certain time limit, it may be prudent to terminate the existing connection.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Integrate a button following the first paragraph exclusively when there are two or more paragraphs present

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> jQuery(document).ready(function($) { if ( $('p').length < 1 ) { $('p:last-child').after('<div id="toggle" class="btn"> ...

javascriptjqueryhtml

Creating dynamic HTML elements for each section using JavaScript

Is there a way to dynamically add a task (input + label) for each specific section/div when entering the name and pressing the "Add" button? I attempted to create an event for each button to add a task for the corresponding div of that particular section, ...

javascripthtmldomaddeventlistener

What is the process for executing a function if the Materialize.css autocomplete feature is not chosen?

Is it feasible to create a function that triggers only when a user does not select an option from Materialize.css autocomplete feature? My goal is to automatically populate an email field with a predefined value based on the user's selection in anothe ...

javascriptjqueryformsautocompletematerialize

the nextjs model is throwing a 400 bad request error when fetching data

I need some assistance with my web application. Whenever I try to create a record by sending data to the API endpoint, it always returns a 400 bad request error on the front end. Surprisingly, when I tested the same request in Insomnia, everything worked p ...

javascriptnext.js

Google Ajax is being blocked by Fetch request

I am a new user of Parse and I have encountered a problem. I am trying to utilize Parse classes for dynamic content, like blog posts. Everything functions correctly when accessing the content, but when attempting to fetch it in Google Webmaster Tools, it s ...

ajaxparse-platformgoogle-search-console

Troubleshooting: Issues with jQuery Validate plugin's rules method in Javascript

I'm encountering an issue with a simple javascript file that is supposed to run the rules method, but it's not working as expected. I have confirmed that my custom javascript file is being rendered correctly since input masking is functioning pro ...

javascriptjqueryasp.netjquery-validate

Unable to successfully transfer parameters from AJAX to PHP

I successfully utilized Jquery UI to update the position of my table. Now, I am trying to pass a parameter from AJAX to PHP in order to update my database with the current table position. However, I encountered an issue where I receive a TypeError: data=nu ...

javascriptphpajaxparameter-passing

javascript assign array to object key

Looking at this basic array: const arr = [ { "id": 2, "color": "red" }, { "id": 1, "color": "blue" }, { "id": 2, "color": "yellow" ...

javascriptarraystypescripthashmap

I'm having trouble getting the JADE tag to render in Express script. Can anyone help me

I am trying to include client-side script in my JADE template and so far I have: extends layout script. function collect_data() { var transitions = {}; $( ":checkbox:checked" ).each(function (index, element) { //// some code ...

javascriptnode.jsexpresspug

Ensuring the session cookie is included in the header of a GET request using iron-ajax

I'm attempting to include my session cookie in a GET request using iron-ajax. However, currently the request does not contain any cookies. Any advice on how to rectify this? <iron-ajax auto url="{{apiHost}}/users/me" withCredentials="true" ...

ajaxxmlhttprequestpolymerpolymer-1.0

Libraries that automatically suggest options for integrating objects described by JSON schema

We are currently developing a platform with an email templating feature. Users can insert objects and variables into their emails using json-schema. Although we are not the first ones to work on this, our research has not turned up many libraries that cou ...

javascriptreactjsjsonschema

The operation of moveImage does not exist

Currently, I am attempting to incorporate setInterval with my moveImage function in order to modify the position of an image. Here is a snippet of my code: <template> <div class="randImg"> <img v-bind:style="{top: imgTop + 'px&ap ...

javascriptfunctionvue.jsecmascript-6setinterval

Confirm that the Time sequence is accurate using JavaScript Selenium

I am working with a list of time intervals that includes 'a day ago, 10 days ago, 3 months ago, and 6 months ago.' How can I verify that these dates are in ascending order using JavaScript and Selenium? I am unsure of how to approach this proble ...

javascriptarrayssortingselenium-webdriver

"Understanding How to Utilize the Grpc Stream Variable for Extended Processes in Node.js

Utilizing Node.js for connecting to a server through gRPC in order to execute a lengthy task. The server sends a one-way stream to the client (Node.js app) while the task is ongoing. I am looking to add a Stop button and have been advised that closing the ...

javascriptnode.jsprocessgrpc

Improving efficiency of basic image carousel in Angular 8

In my Angular 8 app, I am developing a basic carousel without relying on external libraries like jQuery or NgB. Instead, I opted to use pure JS for the task. However, the code seems quite cumbersome and I believe there must be a more efficient way to achie ...

javascriptcssangular

Using AngularJS for AJAX operations with dynamic PHP variables

I have an AngularJS code that is looping through an AJAX JSON response like this: <div ng-repeat="post in posts"> {{post.title}} {{post.url}} </div> It's working fine. How can I pass a PHP variable based on the JSON? Let's assume t ...

javascriptphpajaxjsonangularjs

Tips for resolving the error "Binding element has no default value and initializer provides no value in TypeScript"

I am currently in the process of converting a JavaScript Apollo GraphQL API project to TypeScript. During this migration, I encountered an error related to a user code block: var idArg: any Initializer provides no value for this binding element and the ...

javascriptnode.jstypescriptgraphql

Handling Asynchronous API Requests with AngularJS

I am facing an issue with displaying data from API in my files foo.js and foo.html. While fetching information asynchronously in foo.js, I store it in an object that should be accessible in foo.html. However, despite receiving the data correctly, I am una ...

javascriptangularjsasynchronousangularjs-ng-repeat

Determining if a request is AJAX: The Ultimate Guide with Java Servlet

When dealing with incoming GET or POST requests in a Java servlet, how can we accurately identify if it's an AJAX request? One common method suggested is to extract the information from the header using "XMLHttpRequest".equals(request.getHeader("X-R ...

javaajaxservletsxmlhttprequest

The absence of essential DOM types in a TypeScript project is causing issues

Recently, I've been working on setting up a web app in TypeScript but I seem to be missing some essential types that are required. Every time I compile using npm run build, it keeps throwing errors like: Error TS2304: Cannot find name 'HTMLEleme ...

javascripttypescriptnpm